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KB4317

Features: •Operating Voltage:2.3V~6.5V•High Operating Frequency: 1.2MHz•High Output Voltage: Up to 32V•Shutdown Current <1 A•30V Output Over-voltage protection (min)•Digital Dimming Control.•Built-in Cycle-by Cycle Current-limiting.•Built-in Soft-...

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SeekIC No. : 004384126 Detail

KB4317: Features: •Operating Voltage:2.3V~6.5V•High Operating Frequency: 1.2MHz•High Output Voltage: Up to 32V•Shutdown Current <1 A•30V Output Over-voltage protection (min)...

KB4317 Data Sheet

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Part Number:
KB4317
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/19

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Product Details

Description



Features:

•Operating Voltage:2.3V~6.5V
•High Operating Frequency: 1.2MHz
•High Output Voltage: Up to 32V
•Shutdown Current <1 A
•30V Output Over-voltage protection (min)
•Digital Dimming Control.
•Built-in Cycle-by Cycle Current-limiting.
•Built-in Soft-Start Function.
•0.25V Low Reference Voltage(+/-5%)
•Tiny SOT23-6 Package
•High Efficiency: Up to 90%
•High Output Power: 2W


Application

• LED Module
• LED Backlight for LCD Display Vcc>3.6V(7 ~8 )
• Constant Current Source
" "


Pinout

Connection Diagram


Specifications

Parameter Rated Value Unit
VIN voltage
LX , OVP voltage
EN , FB to GND
Switch Current (ILX)
Continuous power dissipation (SOT23-6 Ta=+25 )
Operating Junction Temperature Range
Lead Temperature (Soldering 5 sec)
Storage Temperature
Package Thermal Resistance (JA)
ESD Susceptibility (HBM)
ESD Susceptibility (MM)		 -0.3 to +6.5
-0.3 to +34
-0.3 to +6.5
0.75
0.35
-35 to 85
260
-65 to 125
250
2
200		 V
V
V
A
W



/W
KV
V



Description

 

The KB4317 step-up converter drives white LEDs with a constant current to provide backlight in cell phones, PDAs, and other hand-held devices. It features allowing series connection of the white LEDs so that the LED currents are identical for uniform brightness. An enable input can be pulsed repeatedly to adjust LED's brightness. The fast 1.2 MHz current-mode PWM control allows for smaller capacitor and inductor. Fault condition protection uses cycle-by-cycle current limiting to sense maximum inductor current, thermal protection and over-voltage protection. Also included soft-start eliminates inrush current during start-up. The 0.25V low reference voltage minimized the power loss across the current-setting resistor.

The KB4317 is available in SOT23-6 packages




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